Melting of d xy Orbital Ordering Accompanied by Suppression of Giant Tetragonal Distortion and Insulator-to-Metal Transition in Cr-Substituted PbVO 3

Takahiro Ogata, Yuki Sakai, Hajime Yamamoto, Satyanarayan Patel, Peter Keil, Jurij Koruza, Shogo Kawaguchi, Zhao Pan, Takumi Nishikubo, Jürgen Rödel, Masaki Azuma

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

PbVO 3 features giant tetragonal distortion (c/a = 1.23) and spontaneous polarization (P s = 101 μC/cm 2 ) originating from the ordering of d xy orbital of V 4+ with single d electrons. A dedicated study of Cr-substituted PbVO 3 prepared by high-pressure synthesis afforded a well-defined variation in c/a ratio. Ensuing changes in atomic structure were correlated to ferroelastic domain switching and a temperature-induced structural transition to a cubic phase accompanied with an insulator-to-metal transition and a negative thermal expansion.

Original languageEnglish
Pages (from-to)1352-1358
Number of pages7
JournalChemistry of Materials
Volume31
Issue number4
DOIs
Publication statusPublished - 2019 Feb 26
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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